Sierra Wireless EV-DO Understanding Domain Names

IP Manager
Rev 3.0B Feb.08 73
•DynamicIPaddressesaregrantedonlywhenyour
PinPoint‐Eisconnectedandcanchangeeachtimethe
modemreconnectstothenetwork.
•StaticIPaddressesaregrantedthesameaddressevery
timeyourPinPoint‐Eisconnectedandarenotinusewhen
yourmodemisnotconnected.
Sincemanycellularproviders,likewire‐basedISPs,donot
offerstaticIPaddressesorstaticaddressaccountscosta
premiumvs.dynamicaccounts,SierraWirelessAirLink
SolutionsdevelopedIPManagertoworkwithaDynamicDNS
servertoreceivenotificationfromSierraWirelessAirLink
modemstotranslatethemodem’sdynamicIPaddresstoa
fullyqualifieddomainname.Thus,youcancontactyour���
PinPoint‐EdirectlyfromtheInternetusingadomainname.
Understanding Domain Names
AdomainnameisanameofaserverordeviceontheInternet
whichisassociatedwithanIPaddress.Similartohowthe
streetaddressofyourhouseisonewaytocontactyouand
yourphonenumberisanother,boththeIPaddressandthe
domainnamecanbeusedtocontactaserverordeviceonthe
Internet.Whilecontactingyouatyourhouseaddressorwith
yourphonenumberemploydifferentmethods,usinga
domainnameinsteadoftheIPaddressactuallyusesthesame
method,justawordbasednameiscommonlyeasierto
rememberformostpeoplethanastringofnumbers.
Understandingthepartsofadomainnamecanhelptounder‐
standhowIPManagerworksandwhatyouneedtobeableto
configurethemodem.Afullyqualifieddomainname(FQDN)
generallyhasseveralparts.
•TopLevelDomain(TLD):TheTLDistheendingsuffixfor
adomainname(.com,.net,.org,etc.)
•CountryCodeTopLevelDomain(ccTLD):Thissuffixis
oftenusedaftertheTLDformostcountriesexcepttheUS
(.ca,.uk,.au,etc.)
•Domainname:ThisisthenameregisteredwithICANN
(InternetCorporationforAssignedNamesandNumbers)
ortheregistryforathecountryoftheccTLD(i.e.ifa
domainispartofthe.caTLD,itwouldberegisteredwith
theCanadiandomainregistry).Itisnecessarytohavea
nameregisteredbeforeitcanbeused.
•Sub‐domainorservername:Adomainnamecanhave
manysub‐domainorservernamesassociatedwithit.Sub‐
domainsneedtoberegisteredwiththedomain,butdonot